Streaking (microbiology)
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In microbiology, streaking is a mechanical technique used to isolate a pure strain from a single species of microorganism, often bacteria. Samples from a colony derived from a single cell are taken fr
Image of Robert Koch, German microbiologist and developer of the modern streaking technique.
Illustration of streak plate procedure to achieve isolated colonies using aseptic technique.
Different labs have different standards as to the direction and style of the streaking.
Nutrient agar
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Nutrient agar is a general-purpose solid medium supporting growth of a wide range of non-fastidious organisms. It typically contains:
Streaking (microbiology)
…to the type of bacteria. A very common type of media used in microbiology labs is known as agar, a gelatinous substance derived from seaweed. The nutrient agar medium creates a sterile and transparent substance which can withstand the high temperatures of bacteria incubation while retaining its shape. Choice…
Streak plates of several bacterial species on nutrient agar plates